Bandwidth Optimization Overview
Bandwidth Optimization (BWOpt) provides closed-loop tactical traffic engineering (TTE) for segment routed policies by automatically detecting and mitigating congestion in your network. It achieves this through a real-time view of the network topology overlaid with a demand matrix built through telemetry-based Segment Routing Traffic Matrix (SRTM). The intent is to optimize bandwidth resource utilization by setting utilization thresholds on links. BWOpt uses the threshold interface utilization requested by the user and compares it to the actual utilization in the network. When interface congestion is detected by BWOpt, it attempts to reroute intent-based traffic from hot spots through the use of TTE SR policies which are deployed to the network via SR-PCE. As network conditions (topology and/or traffic) change over time, BWOpt continues to monitor interface utilization and manage any TTE SR policies deployed, including changing their paths and/or removing them from the network when deemed no longer necessary.